[TUTORIAL] A Gentle Primer on 2D Rotations

http://www.alanzucconi.com/2016/02/03/2d-rotations/

This new series will introduce rotations, translations and other affine transformations. This knowledge is essential not just for 2D games, but also to understand Quaternions and transformations in 3D games.

This first post of the series is a gentle primer on 2D rotations.

• Representing 2D points

• A primer on trigonometry

• Rotating points

• Conclusion

The next posts will cover the following topics:

• Part 2. The Transformation Matrix

• Part 3. Rotations in the Complex Plane

• Part 4. Understanding Rotations in 2D

• Part 5. Understanding Quaternions